Question

我在输入/ testingImagesInput中的hdfs中存储了大约100个图像，如下所示。

hduser@livingstream:/usr/local/hadoop$ bin/hadoop dfs -ls input
Warning: $HADOOP_HOME is deprecated.
Found 1 items
drwxr-xr-x   - hduser supergroup          0 2014-06-03 12:07 /user/hduser/input/testingImagesInput

我正在尝试使用以下代码读取这些图像并将它们写入序列文件：

    Configuration conf = new Configuration();
conf.set("fs.default.name","hdfs://localhost:54310");
FileSystem fs = FileSystem.get(conf);
FSDataInputStream  in = null;
BytesWritable value = new BytesWritable();
Text key = new Text();
Path inpath = new Path(fs.getWorkingDirectory(),"input/testingImagesInput");
Path seq_path = new Path("seq_path");

设置路径和配置后，sequencefilewriter将在从inpath读取后写入seq_path

SequenceFile.Writer writer = null;
try {
    System.out.println("reading from :"+inpath);
    in =  fs.open(inpath);
    byte bufffer[] = new  byte[in.available()];
    in.read(bufffer);
               writer = SequenceFile.createWriter(fs,conf,seq_path,key.getClass(),value.getClass());
writer.append(new Text(inpath.getName()), new BytesWritable(bufffer));
        }catch (Exception e) {
                               TODO// handle e
        }

然而，执行行

时

in = fs.open（inpath）;

它引发了以下错误：

reading from :hdfs://localhost:54310/input/testingImagesInput // form sysout.
Exception MESSAGES = File does not exist: /input/testingImagesInput

我不确定发生了什么错误！任何人都可以指出我正确的方向。

更新

所以我给出了目录路径，即 hdfs：localhost：54310 / user / hduser / input / testingImagesInput 而没有指定图像的任何名称，当我添加了它能够的图像名称时读它。

从hdfs Hadoop1.0.3读取时文件不存在异常

0 个答案: